Physical Sciences

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14 listings
Astronomy & Cosmology
60 listings

4 listings

Automatons, and other medieval devices.
1 listing
Horology
45 listings
Mathematics
13 listings
Medicine & Physic
81 listings
Natural History
147 listings
Optics
2 listings
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Category Stats

Subcategories: 10
Listings: 19 (414 counting subcategories)
Regular: 19
Last listing added: 04/30/18